He is the First and the Last, the Outward and the Inward . He has knowledge of all things. (Surat al-Hadid, 57:3)
Look around your room. Everything you see has been designed and made by someone: the door, the CD-player, a picture hanging on the wall, the window, and so on. Now look through the window at the trees, the Sun, the sky, flying birds, and other people. If it is nighttime, you can watch the stars and the Moon. Knowing that everything in your room has been made, is it not clear that everything around you also has been designed?
The truth of this assertion is apparent. If you cannot claim that a picture hanging on the wall was made by coincidence, then you also cannot claim that the Sun, stars, and the Moon are the result of coincidence. Everything you see on Earth and in the sky has a designer, producer, and creator. Our Lord, Who created everything with great artistry, introduces Himself to us through His creation.
When you look through the window you cannot see Him. However, Allah's existence, power, and artistry is clearly seen in His creation. This is the meaning that al-Batin conveys to us. His existence and control is clear in every corner of the universe, yet no one can see Him unless He wills otherwise:
Eyesight cannot perceive Him, but He perceives eyesight. He is the All-Penetrating, the All-Aware. (Surat al-An‘am, 6:103)